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-rw-r--r--third_party/checker_framework_dataflow/java/org/checkerframework/dataflow/util/PurityChecker.java159
1 files changed, 61 insertions, 98 deletions
diff --git a/third_party/checker_framework_dataflow/java/org/checkerframework/dataflow/util/PurityChecker.java b/third_party/checker_framework_dataflow/java/org/checkerframework/dataflow/util/PurityChecker.java
index 5fafb7a8a1..0b298f1955 100644
--- a/third_party/checker_framework_dataflow/java/org/checkerframework/dataflow/util/PurityChecker.java
+++ b/third_party/checker_framework_dataflow/java/org/checkerframework/dataflow/util/PurityChecker.java
@@ -5,23 +5,6 @@ import org.checkerframework.checker.nullness.qual.Nullable;
import org.checkerframework.checker.compilermsgs.qual.CompilerMessageKey;
*/
-import org.checkerframework.dataflow.qual.Deterministic;
-import org.checkerframework.dataflow.qual.Pure;
-import org.checkerframework.dataflow.qual.Pure.Kind;
-import org.checkerframework.dataflow.qual.SideEffectFree;
-
-import org.checkerframework.javacutil.AnnotationProvider;
-import org.checkerframework.javacutil.InternalUtils;
-import org.checkerframework.javacutil.Pair;
-import org.checkerframework.javacutil.TreeUtils;
-
-import java.util.ArrayList;
-import java.util.Collection;
-import java.util.EnumSet;
-import java.util.List;
-
-import javax.lang.model.element.Element;
-
import com.sun.source.tree.ArrayAccessTree;
import com.sun.source.tree.AssertTree;
import com.sun.source.tree.AssignmentTree;
@@ -64,39 +47,48 @@ import com.sun.source.tree.VariableTree;
import com.sun.source.tree.WhileLoopTree;
import com.sun.source.util.SimpleTreeVisitor;
import com.sun.tools.javac.tree.TreeScanner;
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.EnumSet;
+import java.util.List;
+import javax.lang.model.element.Element;
+import org.checkerframework.dataflow.qual.Deterministic;
+import org.checkerframework.dataflow.qual.Pure;
+import org.checkerframework.dataflow.qual.Pure.Kind;
+import org.checkerframework.dataflow.qual.SideEffectFree;
+import org.checkerframework.javacutil.AnnotationProvider;
+import org.checkerframework.javacutil.InternalUtils;
+import org.checkerframework.javacutil.Pair;
+import org.checkerframework.javacutil.TreeUtils;
/**
* A visitor that determines the purity (as defined by {@link
- * org.checkerframework.dataflow.qual.SideEffectFree}, {@link org.checkerframework.dataflow.qual.Deterministic},
- * and {@link org.checkerframework.dataflow.qual.Pure}) of a statement or expression. The
- * entry point is method {@link #checkPurity}.
+ * org.checkerframework.dataflow.qual.SideEffectFree}, {@link
+ * org.checkerframework.dataflow.qual.Deterministic}, and {@link
+ * org.checkerframework.dataflow.qual.Pure}) of a statement or expression. The entry point is method
+ * {@link #checkPurity}.
*
* @see SideEffectFree
* @see Deterministic
* @see Pure
- *
* @author Stefan Heule
- *
*/
public class PurityChecker {
/**
- * Compute whether the given statement is
- * side-effect-free, deterministic, or both.
- * Returns a result that can be queried.
+ * Compute whether the given statement is side-effect-free, deterministic, or both. Returns a
+ * result that can be queried.
*/
- public static PurityResult checkPurity(Tree statement,
- AnnotationProvider annoProvider, boolean assumeSideEffectFree) {
+ public static PurityResult checkPurity(
+ Tree statement, AnnotationProvider annoProvider, boolean assumeSideEffectFree) {
PurityCheckerHelper helper = new PurityCheckerHelper(annoProvider, assumeSideEffectFree);
PurityResult res = helper.scan(statement, new PurityResult());
return res;
}
/**
- * Result of the {@link PurityChecker}.
- * Can be queried queried regarding whether a given tree was
- * side-effect-free, deterministic, or both; also gives reasons if
- * the answer is "no".
+ * Result of the {@link PurityChecker}. Can be queried regarding whether a given tree was
+ * side-effect-free, deterministic, or both; also gives reasons if the answer is "no".
*/
public static class PurityResult {
@@ -121,48 +113,38 @@ public class PurityChecker {
return types.containsAll(kinds);
}
- /**
- * Get the {@code reason}s why the method is not side-effect-free.
- */
+ /** Get the {@code reason}s why the method is not side-effect-free. */
public List<Pair<Tree, String>> getNotSeFreeReasons() {
return notSeFreeReasons;
}
- /**
- * Add {@code reason} as a reason why the method is not side-effect
- * free.
- */
+ /** Add {@code reason} as a reason why the method is not side-effect free. */
public void addNotSeFreeReason(Tree t, String msgId) {
notSeFreeReasons.add(Pair.of(t, msgId));
types.remove(Kind.SIDE_EFFECT_FREE);
}
- /**
- * Get the {@code reason}s why the method is not deterministic.
- */
+ /** Get the {@code reason}s why the method is not deterministic. */
public List<Pair<Tree, String>> getNotDetReasons() {
return notDetReasons;
}
- /**
- * Add {@code reason} as a reason why the method is not deterministic.
- */
+ /** Add {@code reason} as a reason why the method is not deterministic. */
public void addNotDetReason(Tree t, String msgId) {
notDetReasons.add(Pair.of(t, msgId));
types.remove(Kind.DETERMINISTIC);
}
/**
- * Get the {@code reason}s why the method is not both side-effect-free
- * and deterministic.
+ * Get the {@code reason}s why the method is not both side-effect-free and deterministic.
*/
public List<Pair<Tree, String>> getNotBothReasons() {
return notBothReasons;
}
/**
- * Add {@code reason} as a reason why the method is not both side-effect
- * free and deterministic.
+ * Add {@code reason} as a reason why the method is not both side-effect free and
+ * deterministic.
*/
public void addNotBothReason(Tree t, String msgId) {
notBothReasons.add(Pair.of(t, msgId));
@@ -172,19 +154,21 @@ public class PurityChecker {
}
/**
- * Helper class to keep {@link PurityChecker}'s interface clean. The
- * implementation is heavily based on {@link TreeScanner}, but some parts of
- * the AST are skipped (such as types or modifiers). Furthermore, scanning
- * works differently in that the input parameter (usually named {@code p})
- * gets "threaded through", instead of using {@code reduce}.
+ * Helper class to keep {@link PurityChecker}'s interface clean. The implementation is heavily
+ * based on {@link TreeScanner}, but some parts of the AST are skipped (such as types or
+ * modifiers). Furthermore, scanning works differently in that the input parameter (usually
+ * named {@code p}) gets "threaded through", instead of using {@code reduce}.
*/
protected static class PurityCheckerHelper
extends SimpleTreeVisitor<PurityResult, PurityResult> {
protected final AnnotationProvider annoProvider;
- /** True if all methods should be assumed to be @SideEffectFree,
- * for the purposes of org.checkerframework.dataflow analysis. */
+ /**
+ * True if all methods should be assumed to be @SideEffectFree, for the purposes of
+ * org.checkerframework.dataflow analysis.
+ */
private final boolean assumeSideEffectFree;
+
protected /*@Nullable*/ List<Element> methodParameter;
public PurityCheckerHelper(AnnotationProvider annoProvider, boolean assumeSideEffectFree) {
@@ -192,16 +176,12 @@ public class PurityChecker {
this.assumeSideEffectFree = assumeSideEffectFree;
}
- /**
- * Scan a single node.
- */
+ /** Scan a single node. */
public PurityResult scan(Tree node, PurityResult p) {
return node == null ? p : node.accept(this, p);
}
- /**
- * Scan a list of nodes.
- */
+ /** Scan a list of nodes. */
public PurityResult scan(Iterable<? extends Tree> nodes, PurityResult p) {
PurityResult r = p;
if (nodes != null) {
@@ -229,8 +209,7 @@ public class PurityChecker {
}
@Override
- public PurityResult visitEmptyStatement(EmptyStatementTree node,
- PurityResult p) {
+ public PurityResult visitEmptyStatement(EmptyStatementTree node, PurityResult p) {
return p;
}
@@ -240,8 +219,7 @@ public class PurityChecker {
}
@Override
- public PurityResult visitDoWhileLoop(DoWhileLoopTree node,
- PurityResult p) {
+ public PurityResult visitDoWhileLoop(DoWhileLoopTree node, PurityResult p) {
PurityResult r = scan(node.getStatement(), p);
r = scan(node.getCondition(), r);
return r;
@@ -264,8 +242,7 @@ public class PurityChecker {
}
@Override
- public PurityResult visitEnhancedForLoop(EnhancedForLoopTree node,
- PurityResult p) {
+ public PurityResult visitEnhancedForLoop(EnhancedForLoopTree node, PurityResult p) {
PurityResult r = scan(node.getVariable(), p);
r = scan(node.getExpression(), r);
r = scan(node.getStatement(), r);
@@ -273,8 +250,7 @@ public class PurityChecker {
}
@Override
- public PurityResult visitLabeledStatement(LabeledStatementTree node,
- PurityResult p) {
+ public PurityResult visitLabeledStatement(LabeledStatementTree node, PurityResult p) {
return scan(node.getStatement(), p);
}
@@ -293,8 +269,7 @@ public class PurityChecker {
}
@Override
- public PurityResult visitSynchronized(SynchronizedTree node,
- PurityResult p) {
+ public PurityResult visitSynchronized(SynchronizedTree node, PurityResult p) {
PurityResult r = scan(node.getExpression(), p);
r = scan(node.getBlock(), r);
return r;
@@ -335,8 +310,7 @@ public class PurityChecker {
}
@Override
- public PurityResult visitExpressionStatement(
- ExpressionStatementTree node, PurityResult p) {
+ public PurityResult visitExpressionStatement(ExpressionStatementTree node, PurityResult p) {
return scan(node.getExpression(), p);
}
@@ -368,17 +342,15 @@ public class PurityChecker {
}
@Override
- public PurityResult visitMethodInvocation(MethodInvocationTree node,
- PurityResult p) {
+ public PurityResult visitMethodInvocation(MethodInvocationTree node, PurityResult p) {
Element elt = TreeUtils.elementFromUse(node);
String reason = "call";
if (!PurityUtils.hasPurityAnnotation(annoProvider, elt)) {
p.addNotBothReason(node, reason);
} else {
boolean det = PurityUtils.isDeterministic(annoProvider, elt);
- boolean seFree = (assumeSideEffectFree
- || PurityUtils.isSideEffectFree(annoProvider,
- elt));
+ boolean seFree =
+ (assumeSideEffectFree || PurityUtils.isSideEffectFree(annoProvider, elt));
if (!det && !seFree) {
p.addNotBothReason(node, reason);
} else if (!det) {
@@ -395,9 +367,9 @@ public class PurityChecker {
@Override
public PurityResult visitNewClass(NewClassTree node, PurityResult p) {
Element methodElement = InternalUtils.symbol(node);
- boolean sideEffectFree = (assumeSideEffectFree
- || PurityUtils.isSideEffectFree(annoProvider,
- methodElement));
+ boolean sideEffectFree =
+ (assumeSideEffectFree
+ || PurityUtils.isSideEffectFree(annoProvider, methodElement));
if (sideEffectFree) {
p.addNotDetReason(node, "object.creation");
} else {
@@ -417,16 +389,14 @@ public class PurityChecker {
}
@Override
- public PurityResult visitLambdaExpression(LambdaExpressionTree node,
- PurityResult p) {
+ public PurityResult visitLambdaExpression(LambdaExpressionTree node, PurityResult p) {
PurityResult r = scan(node.getParameters(), p);
r = scan(node.getBody(), r);
return r;
}
@Override
- public PurityResult visitParenthesized(ParenthesizedTree node,
- PurityResult p) {
+ public PurityResult visitParenthesized(ParenthesizedTree node, PurityResult p) {
return scan(node.getExpression(), p);
}
@@ -439,8 +409,7 @@ public class PurityChecker {
return r;
}
- protected PurityResult assignmentCheck(PurityResult p,
- ExpressionTree variable) {
+ protected PurityResult assignmentCheck(PurityResult p, ExpressionTree variable) {
if (TreeUtils.isFieldAccess(variable)) {
// rhs is a field access
p.addNotBothReason(variable, "assign.field");
@@ -455,13 +424,11 @@ public class PurityChecker {
}
protected boolean isLocalVariable(ExpressionTree variable) {
- return variable instanceof IdentifierTree
- && !TreeUtils.isFieldAccess(variable);
+ return variable instanceof IdentifierTree && !TreeUtils.isFieldAccess(variable);
}
@Override
- public PurityResult visitCompoundAssignment(
- CompoundAssignmentTree node, PurityResult p) {
+ public PurityResult visitCompoundAssignment(CompoundAssignmentTree node, PurityResult p) {
ExpressionTree variable = node.getVariable();
p = assignmentCheck(p, variable);
PurityResult r = scan(variable, p);
@@ -494,22 +461,19 @@ public class PurityChecker {
}
@Override
- public PurityResult visitArrayAccess(ArrayAccessTree node,
- PurityResult p) {
+ public PurityResult visitArrayAccess(ArrayAccessTree node, PurityResult p) {
PurityResult r = scan(node.getExpression(), p);
r = scan(node.getIndex(), r);
return r;
}
@Override
- public PurityResult visitMemberSelect(MemberSelectTree node,
- PurityResult p) {
+ public PurityResult visitMemberSelect(MemberSelectTree node, PurityResult p) {
return scan(node.getExpression(), p);
}
@Override
- public PurityResult visitMemberReference(MemberReferenceTree node,
- PurityResult p) {
+ public PurityResult visitMemberReference(MemberReferenceTree node, PurityResult p) {
assert false : "this type of tree is unexpected here";
return null;
}
@@ -524,5 +488,4 @@ public class PurityChecker {
return p;
}
}
-
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-29 08:15:06 +0000